org.w3c.css.sac: public interface: ErrorHandler

org.w3c.css.sac
public interface: ErrorHandler [javadoc | source] Basic interface for CSS error handlers.

If a CSS application needs to implement customized error handling, it must implement this interface and then register an instance with the CSS parser using the parser's setErrorHandler method. The parser will then report all errors and warnings through this interface.

The parser shall use this interface instead of throwing an exception: it is up to the application whether to throw an exception for different types of errors and warnings. Note, however, that there is no requirement that the parser continue to provide useful information after a call to fatalError (in other words, a CSS driver class could catch an exception and report a fatalError).

The HandlerBase class provides a default implementation of this interface, ignoring warnings and recoverable errors and throwing a SAXParseException for fatal errors. An application may extend that class rather than implementing the complete interface itself.

version: $ - Revision: 477010 $

author: Philippe - Le Hegaret

Method from org.w3c.css.sac.ErrorHandler Summary:
error, fatalError, warning

Method from org.w3c.css.sac.ErrorHandler Detail:
public void error(CSSParseException exception) throws CSSException Receive notification of a recoverable error. This corresponds to the definition of "error" in section 1.2 of the W3C XML 1.0 Recommendation. For example, a validating parser would use this callback to report the violation of a validity constraint. The default behaviour is to take no action. The CSS parser must continue to provide normal parsing events after invoking this method: it should still be possible for the application to process the document through to the end. If the application cannot do so, then the parser should report a fatal error even if the XML 1.0 recommendation does not require it to do so.
public void fatalError(CSSParseException exception) throws CSSException Receive notification of a non-recoverable error. This corresponds to the definition of "fatal error" in section 1.2 of the W3C XML 1.0 Recommendation. For example, a parser would use this callback to report the violation of a well-formedness constraint. The application must assume that the document is unusable after the parser has invoked this method, and should continue (if at all) only for the sake of collecting addition error messages: in fact, CSS parsers are free to stop reporting any other events once this method has been invoked.
public void warning(CSSParseException exception) throws CSSException Receive notification of a warning. CSS parsers will use this method to report conditions that are not errors or fatal errors as defined by the XML 1.0 recommendation. The default behaviour is to take no action. The CSS parser must continue to provide normal parsing events after invoking this method: it should still be possible for the application to process the document through to the end.

Method from org.w3c.css.sac.ErrorHandler Detail:

 public  void error(CSSParseException exception) throws CSSExceptionReceive notification of a recoverable error.

This corresponds to the definition of "error" in section 1.2
of the W3C XML 1.0 Recommendation.  For example, a validating
parser would use this callback to report the violation of a
validity constraint.  The default behaviour is to take no
action.

The CSS parser must continue to provide normal parsing events
after invoking this method: it should still be possible for the
application to process the document through to the end.  If the
application cannot do so, then the parser should report a fatal
error even if the XML 1.0 recommendation does not require it to
do so.

 public  void fatalError(CSSParseException exception) throws CSSExceptionReceive notification of a non-recoverable error.

This corresponds to the definition of "fatal error" in
section 1.2 of the W3C XML 1.0 Recommendation.  For example, a
parser would use this callback to report the violation of a
well-formedness constraint.

The application must assume that the document is unusable
after the parser has invoked this method, and should continue
(if at all) only for the sake of collecting addition error
messages: in fact, CSS parsers are free to stop reporting any
other events once this method has been invoked.

 public  void warning(CSSParseException exception) throws CSSExceptionReceive notification of a warning.

CSS parsers will use this method to report conditions that
are not errors or fatal errors as defined by the XML 1.0
recommendation.  The default behaviour is to take no action.

The CSS parser must continue to provide normal parsing events
after invoking this method: it should still be possible for the
application to process the document through to the end.